/**
*	@file QueryOptimizer.h
*
*	@brief this header file is for query optimizer which is indenpendent from query evaluator
*
*	@author li yuchen
*
*	@date 1/28/2011
*/
#ifndef QUERYOPTIMIZER_H
#define QUERYOPTIMIZER_H

extern bool optimize_stop;

/**	@brief after this function, the query tree will be restructured for easy query evaluation */
void OptimizeQuery();

#endif